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		<title>three.js webgl - parametric geometries</title>
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			#info {
				position: absolute;
				top: 0px; width: 100%;
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			a {
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	<body>

		<div id="container"></div>
		<div id="info"><a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - parametric geometries</div>

		<script src="../build/three.js"></script>

		<script src="js/WebGL.js"></script>
		<script src="js/libs/stats.min.js"></script>

		<script src="js/CurveExtras.js"></script>
		<script src="js/ParametricGeometries.js"></script>

		<script>

			if ( WEBGL.isWebGLAvailable() === false ) {

				document.body.appendChild( WEBGL.getWebGLErrorMessage() );

			}

			var camera, scene, renderer, stats;

			init();
			animate();

			function init() {

				var container = document.getElementById( 'container' );

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 2000 );
				camera.position.y = 400;

				scene = new THREE.Scene();

				//

				var ambientLight = new THREE.AmbientLight( 0xcccccc, 0.4 );
				scene.add( ambientLight );

				var pointLight = new THREE.PointLight( 0xffffff, 0.8 );
				camera.add( pointLight );
				scene.add( camera );

				//

				var map = new THREE.TextureLoader().load( 'textures/UV_Grid_Sm.jpg' );
				map.wrapS = map.wrapT = THREE.RepeatWrapping;
				map.anisotropy = 16;

				var material = new THREE.MeshPhongMaterial( { map: map, side: THREE.DoubleSide } );

				//

				var geometry, object;

				geometry = new THREE.ParametricBufferGeometry( THREE.ParametricGeometries.plane( 100, 100 ), 10, 10 );
				geometry.center();
				object = new THREE.Mesh( geometry, material );
				object.position.set( - 200, 0, 200 );
				scene.add( object );

				geometry = new THREE.ParametricBufferGeometry( THREE.ParametricGeometries.klein, 20, 20 );
				object = new THREE.Mesh( geometry, material );
				object.position.set( 0, 0, 200 );
				object.scale.multiplyScalar( 5 );
				scene.add( object );

				geometry = new THREE.ParametricBufferGeometry( THREE.ParametricGeometries.mobius, 20, 20 );
				object = new THREE.Mesh( geometry, material );
				object.position.set( 200, 0, 200 );
				object.scale.multiplyScalar( 30 );
				scene.add( object );

				//

				var GrannyKnot = new THREE.Curves.GrannyKnot();

				var torus = new THREE.ParametricGeometries.TorusKnotGeometry( 50, 10, 50, 20, 2, 3 );
				var sphere = new THREE.ParametricGeometries.SphereGeometry( 50, 20, 10 );
				var tube = new THREE.ParametricGeometries.TubeGeometry( GrannyKnot, 100, 3, 8, true, false );

				torus = new THREE.BufferGeometry().fromGeometry( torus );
				sphere = new THREE.BufferGeometry().fromGeometry( sphere );
				tube = new THREE.BufferGeometry().fromGeometry( tube );

				object = new THREE.Mesh( torus, material );
				object.position.set( - 200, 0, - 200 );
				scene.add( object );

				object = new THREE.Mesh( sphere, material );
				object.position.set( 0, 0, - 200 );
				scene.add( object );

				object = new THREE.Mesh( tube, material );
				object.position.set( 200, 0, - 200 );
				object.scale.multiplyScalar( 2 );
				scene.add( object );

				//

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				container.appendChild( renderer.domElement );

				stats = new Stats();
				container.appendChild( stats.dom );

				window.addEventListener( 'resize', onWindowResize, false );

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				var timer = Date.now() * 0.0001;

				camera.position.x = Math.cos( timer ) * 800;
				camera.position.z = Math.sin( timer ) * 800;

				camera.lookAt( scene.position );

				scene.traverse( function ( object ) {

					if ( object.isMesh === true ) {

						object.rotation.x = timer * 5;
						object.rotation.y = timer * 2.5;

					}

				} );

				renderer.render( scene, camera );

			}

		</script>

	</body>
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